ACTUAL Exam Questions and CORRECT
Answers
mAs is equal to... - CORRECT ANSWER - dose, amount, radiation, quantity, heat, data
What is image quality? - CORRECT ANSWER - What you see on the monitor
What is x-ray quality? - CORRECT ANSWER - Energy of beam
Who developed fluoroscopy? - CORRECT ANSWER - Thomas Edison in 1898
What is collimation? - CORRECT ANSWER - Opening/closing of x-ray field to area of
interest
What two discoveries made x-rays emerge as a medical specialty? - CORRECT
ANSWER - -Snook transformer (allowed us to change voltage)
-Coolidge x-ray tube (vacuum tube that allows x-ray intensity and energy to be selected
separately)
What happens when you improve contrast? - CORRECT ANSWER - Removes shades of
gray
The K-shell has how many electrons? - CORRECT ANSWER - 2 electrons
What is projection? - CORRECT ANSWER - The way a beam enters/exits a patient
Radiographic technique charts are based on what type of patient? - CORRECT
ANSWER - Sthenic
, What are molecules made out of? - CORRECT ANSWER - One or more atoms
Is deterministic...
A) linear, non-threshold
B) linear, threshold
C) non linear, non-threshold
D) non linear, threshold - CORRECT ANSWER -D
Is stochastic...
A) linear, non-threshold
B) linear, threshold
C) non linear, non-threshold
D) non linear, threshold - CORRECT ANSWER -A
Give some examples of stochastic effects. - CORRECT ANSWER - leukemia, thyroid
cancer, lung cancer, bone cancer
Give some examples of deterministic effects. - CORRECT ANSWER - erythema, GI
syndrome, hematologic syndrome, CNS syndrome
Law of Bergonie and Tribondeau - CORRECT ANSWER - -Stem cells are radiosensitive;
mature cells are radioresistant.
-Younger tissues and organs are radiosensitive.
-Tissues with high metabolic activity are radiosensitive.
-High proliferation rate for cells and high growth rate for tissues result in increased
radiosensitivity.